CN206489911U - Hot air exchange type automatic cooling system for paint baking furnace - Google Patents

Abstract

The utility model relates to a baking finish stove technical field especially relates to the automatic cooling system of baking finish stove hot-blast exchange formula, it is including furnace, the convulsions wind channel, the air supply wind channel, circulating fan, heat exchanger, main catalytic combustor, cooling system, the both ends in air supply wind channel respectively with furnace's one end, circulating fan's supply-air outlet intercommunication, the both ends in convulsions wind channel respectively with furnace's the other end, main catalytic combustor's entry intercommunication, heat exchanger's high temperature medium entry and main catalytic combustor's export intercommunication, heat exchanger's high temperature medium export and circulating fan's suction opening intercommunication, heat exchanger's low temperature medium entry, low temperature medium export communicates with cooling system respectively, very big reduction exhaust emission, the reduction causes the pollution and has practiced thrift the energy to the atmosphere.

Description

Hot air exchange type automatic cooling system for paint baking furnace

Technical field:

The utility model relates to the technical field of paint baking furnaces, in particular to a hot air exchange type automatic cooling system for paint baking furnaces.

Background technique:

In the production of enameled wire, the paint solvent evaporates when heated, and burns at a high temperature after being catalyzed. After burning, a high temperature of over 650°C will be generated. This high-temperature airflow is too high to be used, and a large part of it will be used as waste gas Emissions, one will cause pollution to the atmosphere, and the other will cause energy waste.

The patent No. 201010624557.4 previously applied by the applicant is a Chinese patent titled oven temperature control system. The oven temperature control system adopts the method of automatically adding cold air to cool down. Although this method can solve the problem of temperature reduction, the At the same time, a large volume of air is blown in, so that a large amount of exhaust gas must be discharged to achieve the balance of in and out, and the amount of exhaust gas discharge is large, which is not environmentally friendly.

Utility model content:

The purpose of the utility model is to provide a hot air exchange type automatic cooling system for a paint baking furnace which reduces waste gas discharge and saves energy in view of the deficiencies in the prior art.

The purpose of this utility model is achieved through the following technical measures:

Hot air exchange type automatic cooling system for paint baking furnace, which includes a furnace, exhaust air duct, air supply duct, circulation fan, heat exchanger, main catalytic burner, cooling system, the two ends of the air supply duct are respectively connected to one end of the furnace 1. The air supply port of the circulating fan is connected, the two ends of the exhaust air duct are respectively connected with the other end of the furnace and the inlet of the main catalytic burner, the high temperature medium inlet of the heat exchanger is connected with the outlet of the main catalytic burner, and the high temperature of the heat exchanger is connected with the outlet of the main catalytic burner. The medium outlet is communicated with the exhaust port of the circulating fan, and the low-temperature medium inlet and low-temperature medium outlet of the heat exchanger are respectively communicated with the cooling system.

The cooling system includes a cooling fan, a damper device that can be opened or closed automatically, a cold air duct, and a heat exhaust air duct. One end of the hot air passage communicates with the low-temperature medium outlet of the heat exchanger, and the damper device is arranged on the cold air passage.

A temperature sensor is provided at the outlet of the high temperature medium of the heat exchanger.

The utility model also includes a secondary catalytic burner and a waste exhaust fan. The inlet of the secondary catalytic burner is connected with the outlet of the exhaust air duct, and the outlet of the secondary catalytic burner is connected with the exhaust port of the exhaust fan.

The beneficial effect of the utility model is that the utility model includes a furnace, an air exhaust duct, an air supply duct, a circulating fan, a heat exchanger, a main catalytic burner, and a cooling system, and the two ends of the air supply duct are respectively connected to one end of the furnace. 1. The air supply port of the circulating fan is connected, the two ends of the exhaust air duct are respectively connected with the other end of the furnace and the inlet of the main catalytic burner, the high temperature medium inlet of the heat exchanger is connected with the outlet of the main catalytic burner, and the high temperature of the heat exchanger is connected with the outlet of the main catalytic burner. The outlet of the medium is connected with the exhaust port of the circulating fan, and the inlet and outlet of the low-temperature medium of the heat exchanger are connected with the cooling system respectively. High-temperature catalytic combustion is carried out in the main catalytic burner. After catalytic combustion, high-temperature gas of up to 650°C will be generated. The high-temperature gas will be cooled by a heat exchanger, and more than 95% of the heat will be exchanged to the cooling system, and the cooled gas will be sent back to the cooling system. The repeated use of heat energy in the furnace greatly reduces exhaust gas emissions, reduces pollution to the atmosphere and saves energy.

Description of drawings:

Fig. 1 is a structural representation of the utility model.

detailed description:

The utility model will be further described below in conjunction with the accompanying drawings. As shown in Figure 1, the hot air exchange type automatic cooling system for the paint baking furnace provided by the utility model includes a furnace 1, an exhaust air duct 2, an air supply duct 3, and a circulating fan 4 , heat exchanger 5, main catalytic burner 6, cooling system, the two ends of the air supply air duct 3 are connected with one end of the furnace 1 and the air supply port of the circulating fan 4 respectively, and the two ends of the exhaust air duct 2 are connected with the furnace 1 respectively The other end, the inlet of main catalytic burner 6 are communicated, and the high-temperature medium inlet of heat exchanger 5 is communicated with the outlet of main catalytic burner 6, and the high-temperature medium outlet of heat exchanger 5 is communicated with the exhaust port of circulation fan 4, and circulation fan 4 , the air supply duct 3, the furnace 1, the exhaust air duct 2, the main catalytic burner 6 and the heat exchanger 5 form a circulation system, and the low-temperature medium inlet and the low-temperature medium outlet of the heat exchanger 5 communicate with the cooling system respectively.

The cooling system includes a cooling fan 7, a damper device 8 that can be automatically opened or closed, a cold air duct 9, and a heat exhausting air duct 10. The medium inlet is communicated, and one end of the exhaust heat air passage 10 is communicated with the low-temperature medium outlet of the heat exchanger 5, and the damper device 8 is arranged on the cold air passage 9 to blow cold air (room temperature) into the low-temperature medium inlet of the heat exchanger 5 to exchange heat. The high-temperature medium inlet of the device 5 passes through the high-temperature gas produced after combustion, and the temperature of the high-temperature gas is reduced through heat exchange, thereby reducing the amount of temperature-regulated cold air blown by the temperature-regulating fan, so that the amount of exhaust gas will also be reduced accordingly, achieving a reduction in waste discharge environmental protection effect. A temperature sensor 11 is provided at the high temperature medium outlet of the heat exchanger 5 . When the temperature sensor 11 detects that the temperature exceeds the set value, the automatic cooling damper device 8 will automatically open and control the size of the air outlet according to the difference between the over-temperature value and the set value, and automatically adjust the air volume of the cooling fan 7 according to the PLC program. After PID tuning, the temperature is automatically controlled within the set value range to realize the automatic cooling function of heat exchange. The gas after exchanging heat (non-polluting fresh hot air) can be used to heat the cleaning water for cleaning copper wires, or it can be used to increase the temperature of the workshop in winter, etc., to reduce energy waste.

The utility model also includes a secondary catalytic burner 12 and a waste exhaust fan 13. The inlet of the secondary catalytic burner 12 is connected with the outlet of the exhaust air duct 2, and the outlet of the secondary catalytic burner 12 is connected with the exhaust port of the exhaust fan 13. Can turn on exhaust blower fan 13 to discharge waste gas as required.

During the production process of the enameled wire, the paint solvent evaporates when heated in the furnace 1, and is pumped into the main catalytic burner 6 through the circulation fan 4 and the exhaust air duct 2 for high-temperature catalytic combustion. The high-temperature gas is cooled by the heat exchanger 5, and more than 95% of the heat is exchanged to the cooling system. The cooled gas is sent back to the furnace 1 for repeated heat energy utilization, which greatly reduces exhaust gas emissions, reduces pollution to the atmosphere and saves energy. .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art Personnel should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (4)

1. paint baking oven hot wind exchanging type automatic cooling system, includes burner hearth (1), it is characterised in that：Also include exhausting air channel (2), supply air duct (3), circulating fan (4), heat exchanger (5), main catalytic burner (6), cooling system, supply air duct (3) Two ends one end respectively with burner hearth (1), the air outlet of circulating fan (4) connect, the two ends of exhausting air channel (2) respectively with burner hearth (1) the entrance connection of the other end, main catalytic burner (6), high-temperature medium entrance and the main catalytic burner of heat exchanger (5) (6) outlet, the high-temperature medium outlet of heat exchanger (5) is connected with the suction opeing of circulating fan (4), heat exchanger (5) Cryogenic media entrance, cryogenic media outlet connects with cooling system respectively.

2. paint baking oven hot wind exchanging type automatic cooling system according to claim 1, it is characterised in that：The cooling system The throttle setting (8) that include temperature-dropping fan (7), can be automatically opened or closed, cold wind air channel (9), heat extraction air channel (10), it is cold The two ends in wind air channel (9) air outlet respectively with temperature-dropping fan (7), the cryogenic media entrance of heat exchanger (5) are connected, thermal wind exhausting The one end in road (10) is connected with the cryogenic media outlet of heat exchanger (5), and throttle setting (8) is arranged on cold wind air channel (9).

3. paint baking oven hot wind exchanging type automatic cooling system according to claim 1, it is characterised in that：The heat exchanger (5) high-temperature medium exit is provided with temperature sensor (11).

4. paint baking oven hot wind exchanging type automatic cooling system according to claim 1, it is characterised in that：Also include pair to urge Change burner (12), waste discharge blower fan (13), the entrance of secondary catalytic burner (12) and the outlet in exhausting air channel (2), pair is urged The outlet for changing burner (12) is connected with the suction opeing of waste discharge blower fan (13).